Each time i watermark a photo I create a new preset in the edit watermark field. However i have never saved them in the presets box on the left hand box. so I cannot delete the existing presets and now each time i need to create a watermark i have to scroll all the way down until i get to edit watermark to create another one.
How do i delete these watermarks?
They are stored in C:\Users\YourUserName\AppData\Roaming\Adobe\Lightroom\Watermarks.
Close LR and browse to that folder then delete the ones you don't want.
The file extension is .lrtemplate so you can search for them if you're on a Mac.